Date.prototype.format = function (fmt) { //author: meizz  
    var o = {
        "M+": this.getMonth() + 1, //月份  
        "d+": this.getDate(), //日  
        "h+": this.getHours(), //小时  
        "m+": this.getMinutes(), //分  
        "s+": this.getSeconds(), //秒   
        "q+": Math.floor((this.getMonth() + 3) / 3),    //q是季度
        "S": this.getMilliseconds() //毫秒  
    };
    if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    for (var k in o)
        if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
    return fmt;
}

String.prototype.format = function (args) {
    var result = this;
    if (arguments.length > 0) {
        if (arguments.length == 1 && typeof (args) == "loginTime") {
            for (var key in args) {
                if (args[key] != undefined) {
                    var reg = new RegExp("({" + key + "})", "g");
                    result = result.replace(reg, args[key]);
                }
            }
        }
        else {
            for (var i = 0; i < arguments.length; i++) {
                if (arguments[i] != undefined) {
                    //var reg = new RegExp("({[" + i + "]})", "g");//这个在索引大于9时会有问题  
                    var reg = new RegExp("({)" + i + "(})", "g");
                    result = result.replace(reg, arguments[i]);
                }
            }
        }
    }
    return result;
}
function dateFormat(value) {
    return value ? new Date(value*1000).format("yyyy-MM-dd hh:mm:ss") : "";
}